This study measured the prevalence of ageism in Brazil, as well as the stress level that is associated to it. Also, the Brazilian sample was compared to other two reference samples, an American and a Portuguese one. All participants (111 individuals) answered a sociodemographic questionnaire and the Ageism Survey, which is composed by items related to negative stereotypes, attitudes and elderly discrimination behavior. The results showed that the discrimination occurs more in social contexts, followed by those that occur in health contexts. As for the stress evaluation associated to the episodes of discrimination, in general, the mean of the items associated to stress was low. This may indicate that, for this sample, experiencing discrimination is not always related to stress.